pico-sdk: Remove old, unnecessary patch

This was leftover from idk when. It's not in lbmk.

We don't need it here. This is a relic from when
the build system used git's submodules feature.

Nowadays, the build system automatically handles
directories such as what this patch handled.

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/pico-sdk/patches/0001-don-t-include-empty-lib-tinyusb.patch

@@ -1,24 +0,0 @@
-From 7b887dc79a6c1479a8615f0d1a629dea17908812 Mon Sep 17 00:00:00 2001
-From: Leah Rowe <leah@libreboot.org>
-Date: Wed, 25 Oct 2023 09:48:52 +0100
-Subject: [PATCH 1/1] don't include empty lib/tinyusb
-
-otherwise, canoeboot's build system will not
-download tinyusb as per config/git/
-
-Signed-off-by: Leah Rowe <leah@libreboot.org>
----
- lib/tinyusb | 1 -
- 1 file changed, 1 deletion(-)
- delete mode 160000 lib/tinyusb
-
-diff --git a/lib/tinyusb b/lib/tinyusb
-deleted file mode 160000
-index 86c416d..0000000
---- a/lib/tinyusb
-+++ /dev/null
-@@ -1 +0,0 @@
--Subproject commit 86c416d4c0fb38432460b3e11b08b9de76941bf5
--- 
-2.39.2
-